The Potential Perils of Forest Carbon Contracts for Developing Countries: Cases from Africa Journal of Peasant Studies, Vol. 39, No. 2, pp. 551-572 24 Pages Posted: 24 May 2012
Acne in adult women is often hard to treat. One study showed that 80 percent of women prescribed antibiotics for acne receive no benefits from the drugs, Shinkai said. In these cases, the acne may stem from normal hormonal changes, such as those that occur around the menstrual cycle, or from a true hormonal disorder. For many of these women, medications that target hormones, rather than skin bacteria, would provide the most help, Shinkai said.
Causes of acne. Nobody is completely sure what causes acne. Experts believe the primary cause is a rise in androgen levels-androgen is a type of hormone. Androgen levels rise when a human becomes an adolescent. Rising androgen levels make the oil glands under your skin grow; the enlarged gland produces more oil. Types of pimples include whiteheads, blackheads, papules, pustules, nobules, cysts. 2  Approximately three-quarters of 11 to 30 year-olds will get acne at some time. 3  Acne can affect people of all races and all ages. 4  Experts believe the primary cause is a rise in androgen levels (hormone).